Ruby Issue Tracking System

09/21/2026

05:26 AM Ruby Feature #22274: Make `IO::Buffer` no longer experimental.

ioquatix (Samuel Williams) wrote in #note-10:
> As per my design, a buffer that is frozen does not need to update or touch `locked_count` (in fact, only a buffer with `locked_count == 0` can be frozen). Once frozen, all operations (that... himura467 (Akito Shitara)

05:10 AM Ruby Feature #22274: Make `IO::Buffer` no longer experimental.

ioquatix (Samuel Williams) wrote in #note-6:
> `freeze` is for "safe to share this Ruby object" and `readonly` means the backing buffer cannot be modified by this view.
As far as I know, there is currently no API to make an existing ... himura467 (Akito Shitara)

04:56 AM Ruby Feature #22274: Make `IO::Buffer` no longer experimental.

ioquatix (Samuel Williams) wrote in #note-6:
> Therefore, I'm against a frozen buffer meaning underlying memory cannot be modified.
If Matz agrees, I don't have a strong opinion on how freeze should be interpreted. However, under thi... himura467 (Akito Shitara)

04:53 AM Ruby Feature #22274: Make `IO::Buffer` no longer experimental.

ioquatix (Samuel Williams) wrote in #note-6:
> For the purpose of sharing `IO::Buffer`, `freeze`ing this state is sufficient.
Even on a frozen buffer, `#locked` updates `lock_count` with a non-atomic read-modify-write, so two Ractors... himura467 (Akito Shitara)

09/14/2026

11:30 AM Ruby Bug #22311: Build crashes on macOS 26 with the macOS 27 SDK because pipe2() and dup3() are unavailable

Using autoconf 2.73 with `AC_CHECK_DECL` as you suggested would fix it.
However, requiring 2.73 seems difficult for now, since the release tarballs are generated by 2.71, and Ubuntu 24.04/26.04 ship 2.71/2.72.
So I think a runtime ch... himura467 (Akito Shitara)

09/13/2026

09:57 PM Ruby Bug #22311 (Closed): Build crashes on macOS 26 with the macOS 27 SDK because pipe2() and dup3() are unavailable

## Environment
- macOS 26.6.2
- Command Line Tools with MacOSX27.0.sdk (default `MacOSX.sdk`)
- Apple clang version 21.0.0 (clang-2100.3.34.2)
## Steps to reproduce
./autogen.sh
mkdir build && cd build
../configu... himura467 (Akito Shitara)

09/09/2026

09:05 PM Ruby Feature #22056: Add zero-copy String constructor backed by an arbitrary Ruby object

Eregon (Benoit Daloze) wrote in #note-22:
> Unless I'm missing something, I don't think `IO::Buffer#slice_string` can work without copying: it would reference some `char*`, but the `IO::Buffer` might reallocate (e.g. if appended to), an... himura467 (Akito Shitara)

09/08/2026

11:18 PM Ruby Bug #22301 (Closed): Writing to the contents of a frozen IO::Buffer does not raise FrozenError

Writing to the contents of a frozen `IO::Buffer` does not raise `FrozenError`:
```ruby
buffer = IO::Buffer.new(8)
buffer.freeze
buffer.set_string("x", 0) # no FrozenError
buffer.get_string # => "x\x00\x00\x00\x00\x00\x00... himura467 (Akito Shitara)

08/24/2026

05:38 PM Ruby Feature #22231: Add `IO::Buffer#index`

Thanks for taking this.
Matz asked for out-of-range `offset` and `length` to return `nil` rather than raise. Assuming you have no objection to that direction, there are a few points I would like to think through.
The first is wheth... himura467 (Akito Shitara)

08/23/2026

05:57 AM Ruby Misc #22249: DevMeeting-2026-09-10

* [Feature #22056] Zero-Copy String Constructor Backed by Arbitrary Ruby Object (himura467)
* A C API creating a String that references memory owned by another Ruby object instead of copying it.
* It was blocked on the `RSTRING_PTR()... himura467 (Akito Shitara)